Auto-trigger from publish-workspace-server-image now resolves
target_tag to the just-published `staging-<short_head_sha>` digest
instead of `:latest`. Bypasses the dead retag path that was leaving
prod tenants on a 4-day-old image.
The chain pre-fix:
publish-image → pushes :staging-<sha> + :staging-latest (NOT :latest)
canary-verify → soft-skips (CANARY_TENANT_URLS unset, fleet not stood up)
promote-latest → manual workflow_dispatch only, last run 2026-04-28
redeploy-main → pulls :latest → 2026-04-28 digest → all 3 tenants STALE
Today's incident:
e7375348 (main) → publish-image green → redeploy fired → tenants
pulled :latest (76c604fb digest from prior canary-verified state) →
hongming /buildinfo returned 76c604fb instead of e7375348 → verify
step correctly flagged 3/3 STALE → workflow failed.
Today's PRs (#2473 smoke wedge, #2487 panic recovery, #2496 sweeper
followups) shipped to GHCR as :staging-<sha> but never reached prod.
Fix:
- workflow_dispatch input default '' (was 'latest'); empty input
triggers auto-compute path
- new "Compute target tag" step resolves:
1. operator-supplied input → verbatim (rollback / pin)
2. else → staging-<short_head_sha> (auto)
- verify step's operator-pin detection now allows
staging-<short_head_sha> as a non-pin (verification still runs)
When canary fleet is real, this workflow should chain on
canary-verify completion (workflow_run from canary-verify, gated on
promote-to-latest success) instead of publish-image — separate,
smaller PR. Today's fix unblocks prod deploys without that
prerequisite.
Companion: promote-latest.yml dispatched 2026-05-02 against
e7375348 to unstick existing prod tenants. This PR prevents
recurrence.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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